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The impact of anthropometric parameters on colorectal cancer prognosis: A systematic review and meta-analysis
Vita Jaspan1, Kevin Lin1, Violeta Popov2
1Department of Medicine, NYU Langone Health, 550 1st Ave, New York, NY, 10016, USA.
Background & Aims:
Our study aims to clarify the relationship between weight parameters and colorectal cancer outcomes.
Methods:
NCBI, Embase, Cochrane, and Web of Science were searched from inception to December 2019. Studies reporting colorectal cancer (CRC) mortality, recurrence, disease-free survival, overall survival, overall mortality stratified by pre-diagnosis BMI or post-diagnosis weight change, were included in the analysis. Random effects analysis was performed for all outcomes, with heterogeneity assessed by the I2 statistic.
Results:
Our meta-analysis included 45 studies encompassing 607,266 patients. Obesity was associated with increased odds of overall mortality and CRC-specific mortality compared to normal weight (p < 0.001). Patients with underweight BMI had increased odds of CRC-specific mortality compared to normal BMI but were not significantly different from obese BMI.
Conclusions:
Obese and underweight BMI are associated with increased CRC-specific and overall mortality compared to normal BMI. Long term prognosis was similar for patients with obese and underweight BMI.
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